1. Preheat oven to 350 degrees and line pans with cupcake liners.
2. Sift cake mix and cinnamon in to a small bowl and set aside.
3. In a large bowl, combine eggs, butter, applesauce, milk and vanilla extract together.
4. Stir in cake mix until smooth.
5. Stir in chopped apples.
6. Fill cupcake liners ¾ full and bake for 17-22 minutes of until an inserted knife comes out clean.
7. Buttercream: Beat butter for 1 minute. Add caramel and vanilla extract and continue to beat. Slowly add powdered sugar until you reach your desired consistency.
8. Pipe buttercream onto cooled cupcakes and top with melted caramel.